Question

please please solve question number 1 it's too urgent when you can solve it I can mark you as a brainlist.​

Answer 1

A) 7x²+3x+9x-5x²

2x²+12x is ur answer

Answer 2

Answer:

1a)2x(x+6)

b)-12x^2+2x+9

c)8x^2+4x+1

d)9a^2-1ab-6b^2

Step-by-step explanation:

Exercise9.1

1.a)7x^2+3x+9x-5x^2=7x^2-5x^2+3x+9x

                                  =2x^2+12x

                                  =2x(x+6)

b)-10x^2+5x+3-2x^2-3x+6=-10x^2-2x^2+5x-3x+3+6

                                          =-12x^2+2x+9

c)5x^2-2x-3+10x^2-5-7x^2+6x+9=5x^2+10x^2-7x^2-2x+6x-3-5+9

                                                     =8x^2+4x+1

d)6a^2+17ab-5b^2-2a^2-20ab+2b^2+5a^2+2ab-3b^2

                                =6a^2-2a^2+5a^2+17ab-20ab+2ab-5b^2+2b^2-3b^2

                                 =9a^2-1ab-6b^2

Hope you can understand!!